PWM Demo

PWMActivity.java

package com.mini6410.PWM;


import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.ToggleButton;

import com.friendlyarm.AndroidSDK.HardwareControler;
import com.mini6410.R;

/**
 *
 * ClassName:PWMActivity
 * Reason:   PWM Demo
 *
 * @author   snowdream
 * @version
 * @since    Ver 1.1
 * @Date     2011   2012-03-11      17:21
 *
 * @see
 */
public class PWMActivity extends Activity implements Button.OnClickListener,ToggleButton.OnCheckedChangeListener{
    public static final String TAG = "PWMActivity";

    /*PWM频率*/
    public static final int PWM_FREQUENCY_1 = 1;
    public static final int PWM_FREQUENCY_100 = 100;
    public static final int PWM_FREQUENCY_200 = 200;
    public static final int PWM_FREQUENCY_500 = 500;
    public static final int PWM_FREQUENCY_1000 = 1000;
    public static final int PWM_FREQUENCY_2000 = 2000;
    public static final int PWM_FREQUENCY_5000 = 5000;
    public static final int PWM_FREQUENCY_10000 = 10000;

    /*PWM播放时长*/
    public static final int PWM_PLAY_PERIOD_FOR_EVER = -1;
    public static final int PWM_PLAY_PERIOD_100 = 100;
    public static final int PWM_PLAY_PERIOD_200 = 200;
    public static final int PWM_PLAY_PERIOD_300 = 300;
    public static final int PWM_PLAY_PERIOD_500 = 500;
    public static final int PWM_PLAY_PERIOD_1000 = 1000;

    /*PWM播放间隔*/
    public static final int PWM_WAIT_PERIOD_100 = 100;
    public static final int PWM_WAIT_PERIOD_200 = 200;
    public static final int PWM_WAIT_PERIOD_300 = 300;
    public static final int PWM_WAIT_PERIOD_500 = 500;
    public static final int PWM_WAIT_PERIOD_1000 = 1000;


    /*播放频率*/
    public int mfrequency = PWM_FREQUENCY_1000;

    /*频率改变步长Step*/
    public int mfrequencystep = 100;

    /*播放时长*/
    public int mplayperiod = PWM_PLAY_PERIOD_1000;

    /*播放间隔*/
    public int mwaitperiod = PWM_WAIT_PERIOD_1000;

    /*播放次数*/
    public int mplaynum = 20;

    private boolean mStop = false;

    private Button mButtonSub = null;
    private Button mButtonAdd = null;

    private ToggleButton mToggleButtonStartForEver= null;
    private ToggleButton mToggleButtonStartForTimes = null;

    private EditText mEditTextFrequency = null;
    private EditText mEditTextPlayPeriod = null;
    private EditText mTextViewWaitPeriod = null;
    private EditText mEditTextPlayNum = null;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.pwmdemo);

        initUI();
        initData();

    }

    @Override
    protected void onDestroy() {
        mStop = true;
        super.onDestroy();
    }

    /**
     *
     * initUI: 初始化UI
     *
     * @param
     * @return
     * @throws
     */
    public void initUI(){
        mButtonSub = (Button)findViewById(R.id.ButtonSUB);
        mButtonAdd = (Button)findViewById(R.id.ButtonADD);

        /*按钮监听器，具体实现参考下面的函数：onClick*/
        mButtonSub.setOnClickListener(this);
        mButtonAdd.setOnClickListener(this);

        mToggleButtonStartForEver= (ToggleButton)findViewById(R.id.ToggleButtonStartForEver);
        mToggleButtonStartForTimes = (ToggleButton)findViewById(R.id.ToggleButtonStartForTimes);

        /*开关按钮监听器，具体实现参考下面的函数：onCheckedChanged*/
        mToggleButtonStartForEver.setOnCheckedChangeListener(this);
        mToggleButtonStartForTimes.setOnCheckedChangeListener(this);

        mEditTextFrequency = (EditText)findViewById(R.id.EditTextFrequency);
        mEditTextPlayPeriod = (EditText)findViewById(R.id.EditTextPlayPeriod);
        mTextViewWaitPeriod = (EditText)findViewById(R.id.EditTextWaitPeriod);
        mEditTextPlayNum = (EditText)findViewById(R.id.EditTextPlayNum);

        /*EditText监听器，具体实现参考下面的函数：onTextChanged
         * 主要用于获取更改后最新的数值，下同。
         * */
        mEditTextFrequency.addTextChangedListener(new TextWatcher() {

            public void onTextChanged(CharSequence s, int start, int before, int count) {
                // TODO Auto-generated method stub
                try {
                    mfrequency = Integer.parseInt(mEditTextFrequency.getText().toString());
                } catch (NumberFormatException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
                // TODO Auto-generated method stub

            }

            public void afterTextChanged(Editable s) {
                // TODO Auto-generated method stub

            }
        });

        mEditTextPlayPeriod.addTextChangedListener(new TextWatcher() {

            public void onTextChanged(CharSequence s, int start, int before, int count) {
                // TODO Auto-generated method stub
                try {
                    mplayperiod = Integer.parseInt(mEditTextPlayPeriod.getText().toString());
                } catch (NumberFormatException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
                // TODO Auto-generated method stub

            }

            public void afterTextChanged(Editable s) {
                // TODO Auto-generated method stub

            }
        });

        mTextViewWaitPeriod.addTextChangedListener(new TextWatcher() {

            public void onTextChanged(CharSequence s, int start, int before, int count) {
                // TODO Auto-generated method stub
                try {
                    mwaitperiod = Integer.parseInt(mTextViewWaitPeriod.getText().toString());
                } catch (NumberFormatException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
                // TODO Auto-generated method stub

            }

            public void afterTextChanged(Editable s) {
                // TODO Auto-generated method stub

            }
        });

        mEditTextPlayNum.addTextChangedListener(new TextWatcher() {

            public void onTextChanged(CharSequence s, int start, int before, int count) {
                // TODO Auto-generated method stub
                try {
                    mplaynum = Integer.parseInt(mEditTextPlayNum.getText().toString());
                } catch (NumberFormatException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
                // TODO Auto-generated method stub

            }

            public void afterTextChanged(Editable s) {
                // TODO Auto-generated method stub

            }
        });


    }

    /**
     *
     * initData: 初始化各个控件的数值
     *
     * @param
     * @return
     * @throws
     */
    public void initData(){
        mEditTextFrequency.setText(String.valueOf(mfrequency));
        mEditTextPlayPeriod.setText(String.valueOf(mplayperiod));
        mTextViewWaitPeriod.setText(String.valueOf(mwaitperiod));
        mEditTextPlayNum.setText(String.valueOf(mplaynum));
    }


    /**
     *
     * onCheckedChanged: 开关按钮监听器。当有开关按钮的状态改变时，响应点击。
     *
     * @param   buttonView 改变状态的开关按钮对象；
     * @param   isChecked  该开关按钮是否被选中；
     * @return
     * @throws
     */
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        ToggleButton mToggleButton = (ToggleButton)buttonView;

        switch (mToggleButton.getId()) {
        case R.id.ToggleButtonStartForEver:
            if(isChecked){
                PWMPlay(mfrequency);
            }else{
                mStop = true;
                PWMStop();
            }
            break;
        case R.id.ToggleButtonStartForTimes:
            if(isChecked){
                mStop = false;
                PWMThread mPWMThread = new PWMThread();
                mPWMThread.start();
            }else{
                mStop = true;
            }
            break;
        default:
            break;
        }
    }

    /**
     *
     * onClick: 按钮监听器。当有按钮被点击时，响应点击。
     *
     * @param   v 被点击的按钮对象；
     * @return
     * @throws
     */
    public void onClick(View v) {
        Button mButton = (Button)v;

        switch (mButton.getId()) {
        case R.id.ButtonSUB:
            if(mfrequency <= 1)
                mfrequency = PWM_FREQUENCY_1;
            else if(mfrequency == PWM_FREQUENCY_100)
                mfrequency = PWM_FREQUENCY_1;
            else
                mfrequency -= mfrequencystep;

            mEditTextFrequency.setText(String.valueOf(mfrequency));
            break;
        case R.id.ButtonADD:
            if(mfrequency <= 1)
                mfrequency = PWM_FREQUENCY_100;
            else
                mfrequency += mfrequencystep;

            mEditTextFrequency.setText(String.valueOf(mfrequency));
            break;
        default:
            break;
        }
    }

    /**
     *
     * PWMPlay: 启动蜂鸣器 ，并播放。
     *
     * @param   frequency 播放频率
     * @return  true 表示播放成功；否则，表示播放失败。
     * @throws
     */
    public boolean PWMPlay(int frequency)
    {
        boolean ret  = false;
        int result = -1;

        result = HardwareControler.PWMPlay(frequency);

        if(result == 0)
            ret = true;
        else
            ret = false;

        return ret;
    }

    /**
     *
     * PWMStop: 停止并关闭蜂鸣器。
     *
     * @param
     * @return  true 表示停止成功；否则，表示停止失败。
     * @throws
     */
    public boolean PWMStop(){
        boolean ret  = false;
        int result = -1;

        result = HardwareControler.PWMStop();

        if(result == 0)
            ret = true;
        else
            ret = false;

        return ret;
    }

    /**
     *
     * PWMThread: PWM播放线程
     *
     * @param
     * @return
     * @throws
     */
    public class PWMThread extends Thread{

        @Override
        public void run() {
            Log.i(TAG, "PWMThread Start");

            for(int i = 0 ; i < mplaynum; i++ )
            {
                Log.i(TAG, String.valueOf(i));

                if(mStop)
                {
                    PWMStop();
                    break;
                }

                /*启动蜂鸣器，并使用频率 mfrequency 进行播放*/
                PWMPlay(mfrequency);

                /*等待播放时长 mplayperiod 结束*/
                try {
                    sleep(mplayperiod);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

                /*停止蜂鸣器*/
                PWMStop();

                if(mStop)
                    break;

                /*等待播放间隔 mwaitperiod 结束*/
                try {
                    sleep(mwaitperiod);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

            }
            Log.i(TAG, "PWMThread Stop");
        }
    }
}

pwmdemo.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/TextViewFrequency"
            android:layout_width="80dip"
            android:layout_height="40dip"
            android:gravity="center"
            android:text="@string/frequency" />

        <Button
            android:id="@+id/ButtonSUB"
            android:layout_width="40dip"
            android:layout_height="40dip"
            android:gravity="center"
            android:text="@string/sub" />

        <EditText
            android:id="@+id/EditTextFrequency"
            android:layout_width="120dip"
            android:layout_height="40dip"
            android:gravity="center"
            android:inputType="number" />

        <Button
            android:id="@+id/ButtonADD"
            android:layout_width="40dip"
            android:layout_height="40dip"
            android:gravity="center"
            android:text="@string/add" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/TextViewPlayPeriod"
            android:layout_width="80dip"
            android:layout_height="40dip"
            android:gravity="center"
            android:text="@string/playperiod" />

        <EditText
            android:id="@+id/EditTextPlayPeriod"
            android:layout_width="200dip"
            android:layout_height="40dip"
            android:gravity="center"
            android:inputType="number" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/TextViewWaitPeriod"
            android:layout_width="80dip"
            android:layout_height="40dip"
            android:gravity="center"
            android:text="@string/waitperiod" />

        <EditText
            android:id="@+id/EditTextWaitPeriod"
            android:layout_width="200dip"
            android:layout_height="40dip"
            android:layout_gravity="center"
            android:gravity="center"
            android:inputType="number" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/TextViewPlayNum"
            android:layout_width="80dip"
            android:layout_height="40dip"
            android:gravity="center"
            android:text="@string/playnum" />

        <EditText
            android:id="@+id/EditTextPlayNum"
            android:layout_width="200dip"
            android:layout_height="40dip"
            android:layout_gravity="center"
            android:gravity="center"
            android:inputType="number" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/TextViewStartForEver"
            android:layout_width="80dip"
            android:layout_height="40dip"
            android:gravity="center"
            android:text="@string/playforever" />

        <ToggleButton
            android:id="@+id/ToggleButtonStartForEver"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center" />

        <LinearLayout
            android:layout_width="10dip"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >
        </LinearLayout>

        <TextView
            android:id="@+id/TextViewStartForTimes"
            android:layout_width="80dip"
            android:layout_height="40dip"
            android:gravity="center"
            android:text="@string/playfortimes" />

        <ToggleButton
            android:id="@+id/ToggleButtonStartForTimes"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center" />
    </LinearLayout>

</LinearLayout>

预览效果：

原文链接： http://blog.csdn.net/hopezhangbo/article/details/7384615